[GitHub] [pulsar] ksenlaskar opened a new issue #7418: Pulsar metrics for prometheus does not work for short live consumers

Wed, 01 Jul 2020 06:57:56 -0700 


ksenlaskar opened a new issue #7418:
URL: https://github.com/apache/pulsar/issues/7418


   Steps to reproduce the behavior:
   1.Create pulsar topic , and create a consumer which consume from the topic 
at an interval of 500 ms.
   2. Configure prometheus for pulsar
   3. Check the pulsar metrics (pulsar_subscription_msg_rate_out, 
pulsar_rate_out) value 
   4. The value always shows as 0. 
    
   **Additional context**
   We had a short discussion with Sijie over slack on this. And his response 
was "
   The pulsar_subscription_msg_rate_out is calculated by broker. it is sampled 
at Prometheus scrap interval (30s).your udx consumer is a short-live 
consumer.We don’t support well on that". 
   
   
![image](https://user-images.githubusercontent.com/67690671/86252467-e2bf4900-bbd0-11ea-998f-2a66d10279e8.png)
   


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